Lock for knockdown paper boxes.



C. C. IVES & E.4C. IVES, Jn.

`LOCK FOR KNOCKDOWN PAPERv BOXES. APPLICATION FILED JAN.24, |916.

1,1 89,452. Patented July 4,' l1916.

d @z /e/ 2%? I I (5x62 UNITED STATES Vi-inlTnuT ormoni- CHARLES CURTIS IVES, OF MINNEAPOLIS, AND EBEN CEPHAS IVES, JR., OE ST. PAUL,- MINNESOTA,`ASSIGNORS OF ONE-THIRD TO EBEN CEPHAS IVES, SR., VOIE ST. PAUL,

MINNESOTA.

LOCK FOR KNOCKDOWN PAPER BOXES.

Patented July 4, 1916.

Appncatin med ranuary'ai, 191e.' serial No. 73,984.

To all whom t may concern l Be it known that we, CHARLES IvEs, re-

siding at 5120 Thirty-first avenue, South,-

M inneapolis, county of Hennepin, and EBEN C. IvEs, J r., residing at 395 Hall avenue, St. A

Paul, Ramsey county, both in the State of Minnesota, the above-named being citizens of the United States of America, have invented anew and useful Lock for Knockis a specification.

Our inventlon relates to an improved locking device for knock-down paper boxes which are made 0f a single sheet of paper, cardboard, strawboard or other similar material capable of being bentl and manipulated, and the object of our improvement is to secure greater strength and rigidity and a closer and rmer engagement of the interlocking parts. We attain this object by the means and in the manner illustrated in the accompanying drawing,'in which- Figure 1 shows the die-cut blank for a rectangular paper box, with lines showing scoringand perforatingV necessary for prop` erly bending and folding; Fig. 2 shows the box as partly set up; and Fig. 3 shows the box as completely set up and -ready for use.

Similar letters refer to similar parts throughout the views.

' The iat blank, asshown in Fig. 1, has corner sections, perforated diagonally als down Paper Boxes, of which the following shown by the brokenfline, e e, to permit of being folded in, on and against the end proper ofthe box, and an end piece A, continuous with the end proper, such end piece to be folded over and in,'on such end proper and the corner sections. A nd d d are cut-outs orslots at right angles or approximately right angles to the perforated diagonal line e e in the corner sections; and c o are notched cut-ins in the end piece A.

Fig. 2 shows the box partly set up, with the corner sections folded in, on and against the end proper of the box,`lthus forming a lip or projection at d, for receiving in eny gagement the notched ends c 0 of the end Fig. 3 shows the box completely 'set up, with the lips or projections formed by doubling in the corner sections engaged and interloeked with the' notched end piece e exact form, position or angle shown in the diagram, if the angle of such cut-outs with the perforated line' be sufficient to present a substantial lip, and the angle at which each end of the slot meets the perforated line of fold that bisects it be the same, the lip formed when the corner is folded in being more or'less acute as the angle varies. So, also, the notched indentation of the endpiece at c may be varied in outline, providlng 1t offers sufficient projection \for engagement. We have shown in our diagram what we believe to be a preferable arrangement. Therefore we do not wish to be confined to i the exact form shown in the diagram.

We are aware that in the manufacture of knock-down paper boxes the folding in of corner sections bymeans of and 0n a scored or perforated line is old, as is a cut-out at the side of such line, in various positions to receive a tongue or corner; but the loose clutch thus eected has been unsatisfactory where a firm corner is required, inadequate for the purpose, and has not met with commercial success. But the novel feature of our invention consists in utilizing, as a means t0 procure a rmer engagement than heretofore in use, a slot in a diagonally scored o r vperforated corner. section, such slot being at a. suficient angle to such folding line and bisected by it, and the lip thus formed when such corner section is folded in against the end proper ofthe box, such lip receiving in rm engagement a foldedover end piece notched for that purpose.

g 1,189,452 Therefore We claim: diagonally perforated corner section, a. l. A lock for a paper box consisting of a slot at an angle to such -lne of perforacorner sect-ion perforated by a diagonal line, tion and biseeted thereby, and an end-piece 10 a slot at an angle with such line and bsected notched at the sides, substantially as de- 5 thereby, and a notched end-piece, substanscribed. V

tially as set forth. CHARLES CURTIS IVES.

2. In a paper box a lock composed of a EBEN CEPHAS IVES, JR. 

